Energy in Ecosystems
1. What is an ecosystem?
Plants and animals are living parts of an ecosystem. Rocks, soil, water, and sunlight are nonliving parts of an ecosystem.
Habitats provide food, water, and shelter for survival.
2. How do plants get energy?
Plants use their leaves to trap sunlight and to let air in and out. Plants get water from the soil through their roots.
Plants use carbon dioxide, water, and light from energy to produce sugar.
3. How do other living thigns get energy?
Consumers get the energy they need by eating plants and animals.
Scavengers are animals that eat dead animals. Decomposers break down dead plants and animals and put minerals and nutrients back into the soil, air, and water.
4. What are food chains and food webs?
Energy is passed from one organism to another through a food chain.
Many food chains make up a food web.
Changes in the environment, such as flooding, storms, fires, using pesticides, overfishing, deforestation, or pollution, can affect food webs.
ecosystem all the living and nonliving things in an environment and how they interact
habitat a place where an animal or plant lives
chlorophyll the green substance found in plants that traps energy from the sun and gives plants their green color
carbon dioxide a gas found in air
photosynthesis a process by which plants change light energy from the sun and use it to make sugar
producer a living thing that uses sunlight to make sugar
consumer a living thing that gets energy by eating plants and other animals
herbivore a consumer that eats plants
carnivore a consumer that eats other consumers
omnivore a consumer that eats both plants and other consumers
scavenger an animal that eats dead animals
decomposer a consumer that puts materials from dead plants and animals back into the soil, air, and water
food chain the flow of energy through a community
predator an animal that hunts and kills other animals for food
prey the animals that predators hunt
food web all the food chains in a community